Category Archives: Conference

Shun and Shogo gave presentations at IEICE General Conf.

尾形くんと田邉くんが福岡 九州大学伊都キャンパスにて開催されたIEICE 総合大会にてそれぞれ発表を行いました.

Our member, Shun and Shogo, gave presentations at IEICE general conference held in Kyushu University, Fukuoka.


Recent News

Prof. Ishibashi gave a requested talk about graph-based communication theory at IEICE RCS in Osaka, Japan.

12541160_1107297995971803_2768628039167653061_n12439488_1107298002638469_7976287270056296048_nAlso, our member, Shun and Hiroki, presented their new results respectively about frameless ALOHA and opportunistic relaying at IEICE SR in Nagasaki, Japan.

Presentation at SITA 2015

Hiroki Kawabata and Shun Ogata, who are 2nd grade master students, gave presentations at The 38th Symposium on Information Theory and its Applications (SITA2015) at Okayama, Japan on Nov. 25th, 2015. Titles are as follows:

H. Kawabata, K. Ishibashi, S. Vuppala, and G. Abreu, “Design and Analysis of Energy Harvesting Relay Selection Using Channel Distribution Information.”

S. Ogata, K. Ishibashi, and G. Abreu, “Analysis of Packet Decoding Probability for Frameless ALOHA with Multiple Base Stations.”


川畑大樹,石橋功至,ヴッパラ サティアナラヤナ,アブレウ ジュゼッペ,”チャネル分布情報を用いたエナジーハーベスティング中継端末選択手法の 設計と解析”

尾形駿,石橋功至,アブレウ ジュゼッペ,”複数ベースステーション存在下におけるフレームレス ALOHA の パケット復号確率解析法に関する一検討”


Presentation at Asilomar Conf. on Signals, Systems and Computers

Shun Ogata, our member, gave a presentation entitled “Frameless ALOHA with Multiple Base Stations” at 49th Asilomar conference on signals, systems and computers held at Asilomar Conference Grounds, CA, the United States on Nov. 9th.

11月9日,米国Asilomar Conference Groundsで開催された49th Asilomar conference on signals, systems and computerにおいて,M2尾形駿君が”Frameless ALOHA with Multiple Base Stations”と題して発表を行いました.


Our paper has been accepted to Asilomar’15

Our paper entitled “Frameless ALOHA with Multiple Base Stations” has been accepted to Asilomar’15 will be held at Asilomar Conference Grounds, CA.

The program is available at the following website:


Our member, Hiroki Kawabata, gave presentation titled “Analysis of Energy Harvesting Relay Selection Using Channel Distribution Information” at IEICE SR, Akashi, Japan.


“チャネル分布情報を用いたエナジーハーベスティング中継端末選択法の解析”,川畑大樹,ヴッパラ サティアナラヤナ,アブレウ ジュゼッペ,石橋功至


English follows Japanese.

2015年3月に滋賀県立命館大学で開催されたIEICE 2015年総合大会において、修士1年川畑大樹君、尾形 駿君が下記のテーマで発表を行いました。

“チャネル分布情報を用いたエナジーハーベスティング中継端末の選択法に関する一検討”,川畑大樹,Abreu Giuseppe,Vuppala Satyanaranaya,石橋功至

“Frameless ALOHAにおけるターゲット重みの最適化”,尾形駿,ジュゼッペ  アブレウ,石橋功至

Our members, Hiroki Kawabata and Shun Ogata gave presentations titled “A study on energy harvesting relay selection using channel distribution information”  and “Optimization of the target degree of frameless ALOHA,” respectively at the 2015 IEICE General Conference.


English follows Japanese.

2015年3月に東京工業大学で開催されたRCS研究会において、修士2年 武石直樹君、修士1年 尾形 駿君が下記のテーマで発表を行いました。

“分散多次元空間結合Repeat-Accumulate符号”, 武石直樹, 石橋功至, アブレウ ジュゼッペ

“フレームレスALOHAにおけるターゲット重み分布の密度発展法を用いた最適化”, 尾形 駿, アブレウ ジュゼッペ, 石橋功至


Our members, Naoki Takeishi and Shun Ogata gave presentations about distributed multi-dimensional spatially coupled Repeat-Accumulate code and optimization of target degree distribution using density evolution for frameless ALOHA, respectively at IEICE RCS, Tokyo, Japan.

Our paper has been accepted to IEEE WCNC’15.

Our paper entitled “spatially-coupled repeat accumulate coded cooperation” has been accepted to IEEE WCNC’15 will be held at New Orleans, LA.

The program of Track1 (PHY and Fundamentals) is available at the following website:

The paper proposes the effective technique to simultaneously obtain the diversity and coding gain even when both the number of users and the length of information packets are limited. The proposed approach significantly improves the decoding performance compared with conventional cooperative techniques.